Re: [Ecrit] draft-ietf-ecrit-similar-location-11.txt (was: Ecrit Digest, Vol 187, Issue 52)

[Dan Banks <[e-mail]>]

Regarding the examples in section 3, I'm a bit uncomfortable with addresses not being expressed in a way that is consistent with the CLDXF profile (fully spelled out), although I agree that they can still communicate the concepts while using abbreviations.  I would prefer that we modify these to use fully spelled STS and POD values since CLDXF is supposed to be the official profile for the locations being used.  And IIRC, CLDXF also requires the use of <country>.

However, the point you make about missing country is important for another, more basic reason.  While <country> is minOccurs="0" in the civicAddress schema of RFC 5139, for all practical purposes a LoST server (with less than global coverage, at least) cannot be expected to know if it (or another server) is authoritative for a queried location if that location does not include country.  Because of this, our implementation considers civic locations without country to be invalid - not in the <locationValidation> <invalid> list sense, but in the <locationInvalid> error sense.

So, I think the first example where the complete location adds country, A1, and PC is a poor example.  In order for this to occur, the LoST server would need to know that the remaining elements are globally unique in combination - or more practically, that there is only one A3 = "Seattle" in the world.

I think it would be a better example to illustrate the addition of something like an STS value where the RD is already unique within the county+A1+A3 that is shown, which would be a reasonable determination for a LoST server to be able to make.

Additionally, I believe the later example of input and similar addresses should also include country.

Dan

> -----Original Message-----
> From: Ecrit <[e-mail]> On Behalf Of Victor Burton
> Sent: Friday, October 1, 2021 1:22 PM
> To: [e-mail]
> Subject: Re: [Ecrit] draft-ietf-ecrit-similar-location-11.txt (was: Ecrit Digest,
> Vol 187, Issue 52)
> 
> Introduction: Delete "timely".
> Use of this enhancement increases the likelihood that the correct and/or
> complete
>    form of a civic location becomes timely known in those cases where it
>    is incomplete or incorrect.
> 
> Terminology: Replace "can be" with is
> Location:  The term Location can be used to refer to either a civic location or a
> geodetic location.
> 
> Section 3: Include "US" in the similarLocation address returned from LoST. It's
> a required CAType for addresses submitted to the ECRF, correct?
>    Similar address #1: 6000 15th Ave NW Seattle, WA 98107 US
> 
>    Similar address #2: 6000 15th Ave NE Seattle, WA 98105 US After reading
> the example in section 5.2 which aligns with section 3, the Input address:
> 6000 15th Ave N Seattle, WA. should also include US. I assume the LVF will
> validate an address without <country> but then the description in section 3
> would need to state that, correct?
> 
> 
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>    1. I-D Action: draft-ietf-ecrit-similar-location-11.txt
>       ([e-mail])
>    2. WGLC draft-ietf-ecrit-similar-location-11 -- end date Oct 13
>       (Randall Gellens)
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> Message: 1
> Date: Wed, 29 Sep 2021 12:07:46 -0700
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> Subject: [Ecrit] I-D Action: draft-ietf-ecrit-similar-location-11.txt
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> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the Emergency Context Resolution with Internet
> Technologies WG of the IETF.
> 
>         Title           : A LoST extension to return complete and similar location info
>         Authors         : Brian Rosen
>                           Roger Marshall
>                           Jeff Martin
>         Filename        : draft-ietf-ecrit-similar-location-11.txt
>         Pages           : 18
>         Date            : 2021-09-29
> 
> Abstract:
>    This document introduces a new way to provide returned location
>    information in LoST responses that is either of a completed or
>    similar form to the original input civic location, based on whether
>    valid or invalid civic address elements are returned within the
>    <findServiceResponse> message.  This document defines a new extension
>    to the <findServiceResponse> message within the LoST protocol
>    [RFC5222] that enables the LoST protocol to return in a response a
>    completed civic address element set for a valid location response,
>    and one or more suggested sets of similar location information for an
>    invalid location.  These two types of civic addresses are referred to
>    as either "complete location" or "similar location", and are included
>    as a compilation of CAtype xml elements within the existing LoST
>    <findServiceResponse> message structure.
> 
> 
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> 
> ------------------------------
> 
> Message: 2
> Date: Wed, 29 Sep 2021 12:51:36 -0700
> From: "Randall Gellens" <[e-mail]>
> To: ECRIT <[e-mail]>
> Subject: [Ecrit] WGLC draft-ietf-ecrit-similar-location-11 -- end date
>         Oct 13
> Message-ID: <6AA591C6-B84B-4A7E-936A-
> [e-mail]>
> Content-Type: text/plain; format=flowed; markup=markdown
> 
> This starts WGLC for draft-ietf-ecrit-similar-location-11, a LoST extension to
> return complete or similar location info.
> 
> Please send both comments and messages that you support advancement of
> the draft to this mailing list before October 13.
> 
> Thank you,
> 
> --Randall
> 
> 
> 
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